Server : Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/7.4.20 System : Linux st2.domain.com 3.10.0-1127.10.1.el7.x86_64 #1 SMP Wed Jun 3 14:28:03 UTC 2020 x86_64 User : apache ( 48) PHP Version : 7.4.20 Disable Function : NONE Directory : /proc/self/root/home/real/node-v13.0.1/deps/v8/src/utils/ |
// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_UTILS_UTILS_INL_H_
#define V8_UTILS_UTILS_INL_H_
#include "src/utils/utils.h"
#include "include/v8-platform.h"
#include "src/base/platform/time.h"
#include "src/init/v8.h"
#include "src/strings/char-predicates-inl.h"
namespace v8 {
namespace internal {
class TimedScope {
public:
explicit TimedScope(double* result)
: start_(TimestampMs()), result_(result) {}
~TimedScope() { *result_ = TimestampMs() - start_; }
private:
static inline double TimestampMs() {
return V8::GetCurrentPlatform()->MonotonicallyIncreasingTime() *
static_cast<double>(base::Time::kMillisecondsPerSecond);
}
double start_;
double* result_;
};
template <typename Char>
bool TryAddIndexChar(uint32_t* index, Char c) {
if (!IsDecimalDigit(c)) return false;
int d = c - '0';
if (*index > 429496729U - ((d + 3) >> 3)) return false;
*index = (*index) * 10 + d;
return true;
}
template <typename Stream>
bool StringToArrayIndex(Stream* stream, uint32_t* index) {
uint16_t ch = stream->GetNext();
// If the string begins with a '0' character, it must only consist
// of it to be a legal array index.
if (ch == '0') {
*index = 0;
return !stream->HasMore();
}
// Convert string to uint32 array index; character by character.
if (!IsDecimalDigit(ch)) return false;
int d = ch - '0';
uint32_t result = d;
while (stream->HasMore()) {
if (!TryAddIndexChar(&result, stream->GetNext())) return false;
}
*index = result;
return true;
}
} // namespace internal
} // namespace v8
#endif // V8_UTILS_UTILS_INL_H_